John j



(No Model.)

J. J. HOGAN.

RIBBED CYLINDER PATTERN.

No. 416,333. Patented Dec. 3, 1889.

N. PKYERS. Halo-Lithographer. Wmhmglolm II. C.

.pose its interior, when the clamp co UNITED STATES PATENT OFFICE.

JOHN J. HOGAN, OF NEW YORK, N. Y., AS SIGNOR TO THE HOGAN ENGINEER- INGCOMPANY, OF SAME PLACE.

RlBBED-CYLINDER PATTERN.

SPECIFICATION forming part of Letters Patent No. 416,333, dated December3, 1889.

Application filed December .4, 1888. Serial No. 292,640%- (No model.) i

To all whom it may concern:

Be it known that I, JOHN J. HOGAN, a citizen of the United States,residing in the city, county, and State of New York, have inventedcertain new and useful Improvements in Ribbed- Cylinder Patterns, fullydescribed and represented in the following specification and theaccompanying drawings, forming a part of the same.

The object of this invention is to furnish a convenient means of moldingribbed cylinders, such as the columns or sections used in theconstruction of steam and water radiators; and the invention involvesthe use of a hollow shell having a circumferential series of slotsextended through the same and a series of pieces projected through suchslots to be retracted at the close of the molding operation tofacilitate the removal of the pattern from the mold. Where acircumferential series of radial slots is employed, the circumferentialseries of pieces projected through such slots are not parallel andcannot, therefore, be joined together by a common carrier, so as toretract simultaneously within the pattern. Y independent of one anotherand locked within the shell by a suitable clamp adapted to hold the ribsin place until they are fully molded, the mold being then opened and thepattern divided to remove the clamp and withdraw the ribs separately. Atthe close of the molding operation the extension of the ribs into thesand would hold the opposite halves of the pattern firmly therein untilthe mold was opened and the ribs retracted. The opening of the moldwould divide the patternland exmoved and the separate ribs retractedthrough the slots, after which the cylindrical shell could be readilylifted from the mold.

The invention is shown in the annexed drawings, in which- Figure 1 is aside view of a cylindrical radiator-column provided with transverseheads at its opposite ends, and longitudinal ribs projected at intervalsfrom the Whole of the cylindrical body. Fig. 2 is a transverse sectionof the same on line 00 0c in Fig. 1-. Fig. 3 is an inside View ofone-half of a pattern to mold such radiator-column. Fig. 4 isatrans- Thepieces may, however, be made,

rHae re- 1 verse section of two such half-patterns on line y 3 in Fig.3, and Fig. 5 is a transverse section of an alternative construction.Fig. 6 is a side view of one of the tongues 0 detached from the pattern,and Fig. 7 is a view of the inner edge of the same.

In Figs. 1 and 2, A is the cylindrical body of the column, B thetransverse heads, and C the longitudinal ribs. The pattern for moldingthe same is constructed with the hollow cylindrical shell a, providedwith longitudinal radial slots (1, in which are inserted longitudinaltongues c, which project beyond the exterior of the shell sufficientlyto form the desired ribs. The shell isformed with integraltongues c atthe extreme bottom and at the opposite top edges, as such ribs wouldreadily lift from the sand without retraction. The intermediate tongues,however, operate to lock the pattern into the sand when molded; butbeing formed separate from the shell and loosely inserted in thelongitudinal slots d, they may be readily retracted, while the sand isfirmly held by the cylindrical surface of the shell and the mold thuscompleted without much rapping or shaking of the pattern to loosen ittherein.

To hold the tongues in place in the slots, a

clamp e, of semicircular shape, is shown fitted to the interior of theshell, and the inner faces of the tongues are constructed to be flushwith the inside of the shell, so that the clamp when secured in placeby-the screw f operates to hold all'the tongues in position for'molding.

The column is shown in Fig. 2 of cylindrical form, and the pattern isconstructed with two semi-cylindrical halves, as shown in Fig.

4, only one of the halves being shown in Fig. 3. The two halves are heldin line by dowels g, fitted in holes h.

The method of molding such pattern is well known, and consists inburying one half.the pattern in the sand and ramming the sand 5 aroundthe tongues c. The other half of the pattern would then be applied tothe half already molded, and, the cope of the mold being-applied to thebed the sand would be rammed about the upper half of the patioo tern.

The separation of the cope from the bed when the molding was completedwould divide the pattern into halves, and thus expose its interior togive access to the clamp and tongues. 'lhe clamp could then be readilyremoved from each half of the pattern and the tongues retractedseparately through their slots, lifters i being formed upon the tonguesto serve as handles when witlulrawing them from the slots, as is clearlyshown in the detached views of a single tongue in Figs. 6 and 7, and inFig. 5, where the clamp is omitted to clearly show the lifters upon allthe tongues c.

In Fig. (5 one of the tongues is shown formed with beveled ends, whichgreatly facilitates its removal from the slot by permitting one end tobe lifted out without reference to the other, whereas a tongue withsquare ends would require to be retracted with great care parallel tothe shell of the pattern until it was wholly clear from the slot. Theslots are also shown tapered in cross-section in Fig. l and the tonguesbeveled to fit the same upon their opposite sides, partly to facilitatethe removal of the tongues from the slots and partly to form a positivebearin for the tongue in the slot when its wider edgeis flush with theinner surface of the shell. By such construction the clamp may beconstructed without reference to the number of tongues to merely lit theinterior of the shell, and then operates effectively to hold all thetongues firmly in the slots, as desired.

In Fig. 5 the slots and tongues are shown of curved transverse section,by which construction curved tongues may be readily retracted within thehollowshell of the pattern and curved ribs be f ormcd upon the exteriorof the casting with the same facility as straight radial projections.

As the clamp shown is semi-cylindrical in profile, it is obvious that acylindrical block fitted to the inside of the shell would operate as aclamp without any fastening-screw.

I hereby disclaim my patent application, No. 276,209, filed June 6,1888, for foundrypattern.

,llaving thus set forth 111)lllV011lJlO1l,Wll2tli I claim herein is i 1.A pattern consisting in the cylindrical shell a, divided to expose itsinterior and formed with a series of radial longitudinal slots (1 andwith a series of longitudinal tongues c, fitted to such slots andprojected from the exterior of the pattern, and held in place during themolding operation by a clamp, as and for the purpose set forth.

2'. A pattern consisting in the cylindrical shell a, divided to exposeits interior and formed with a series of radial longitudinal taperedslots and with a series of tapered longitudinal tongues fitted to suchslots, with their inner edges flush with the inside of the shell andtheir outer edges projected from its exterior, and a semi-cylilnlricalclamp fitted to the interior of the shell and pressed upon the inneredges of the tongues, as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

JOHN J. HOGAN.

Witnesses:

(,innncrrr H. MeGLoIN, Janus W. GALLAGHER.

